mirror of
https://github.com/leozide/leocad
synced 2024-11-17 07:47:55 +01:00
628 lines
15 KiB
C++
628 lines
15 KiB
C++
#include "lc_global.h"
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#include "lc_math.h"
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#include "lc_colors.h"
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <math.h>
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#include "light.h"
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static LC_OBJECT_KEY_INFO light_key_info[LC_LK_COUNT] =
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{
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{ "Light Position", 3, LC_LK_POSITION },
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{ "Light Target", 3, LC_LK_TARGET },
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{ "Ambient Color", 3, LC_LK_AMBIENT_COLOR },
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{ "Diffuse Color", 3, LC_LK_DIFFUSE_COLOR },
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{ "Specular Color", 3, LC_LK_SPECULAR_COLOR },
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{ "Constant Attenuation", 1, LC_LK_CONSTANT_ATTENUATION },
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{ "Linear Attenuation", 1, LC_LK_LINEAR_ATTENUATION },
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{ "Quadratic Attenuation", 1, LC_LK_QUADRATIC_ATTENUATION },
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{ "Spot Cutoff", 1, LC_LK_SPOT_CUTOFF },
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{ "Spot Exponent", 1, LC_LK_SPOT_EXPONENT }
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};
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// =============================================================================
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// LightTarget class
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LightTarget::LightTarget(Light *pParent)
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: Object(LC_OBJECT_LIGHT_TARGET)
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{
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m_pParent = pParent;
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/*
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strcpy(m_strName, pParent->GetName());
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m_strName[LC_OBJECT_NAME_LEN-8] = '\0';
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strcat(m_strName, ".Target");
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*/
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}
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LightTarget::~LightTarget()
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{
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}
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void LightTarget::MinIntersectDist(lcClickLine* ClickLine)
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{
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lcVector3 Min = lcVector3(-0.2f, -0.2f, -0.2f);
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lcVector3 Max = lcVector3(0.2f, 0.2f, 0.2f);
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lcMatrix44 WorldLight = ((Light*)m_pParent)->mWorldLight;
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WorldLight.SetTranslation(lcMul30(-((Light*)m_pParent)->mTargetPosition, WorldLight));
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lcVector3 Start = lcMul31(ClickLine->Start, WorldLight);
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lcVector3 End = lcMul31(ClickLine->End, WorldLight);
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float Dist;
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if (lcBoundingBoxRayMinIntersectDistance(Min, Max, Start, End, &Dist, NULL) && (Dist < ClickLine->MinDist))
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{
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ClickLine->Closest = this;
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ClickLine->MinDist = Dist;
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}
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}
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void LightTarget::Select(bool bSelecting, bool bFocus, bool bMultiple)
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{
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m_pParent->SelectTarget(bSelecting, bFocus, bMultiple);
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}
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const char* LightTarget::GetName() const
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{
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return m_pParent->GetName();
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}
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// =============================================================================
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// Light class
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// New omni light.
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Light::Light(float px, float py, float pz)
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: Object(LC_OBJECT_LIGHT)
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{
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Initialize();
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float pos[] = { px, py, pz }, target[] = { 0, 0, 0 };
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ChangeKey(1, true, pos, LC_LK_POSITION);
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ChangeKey(1, true, target, LC_LK_TARGET);
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UpdatePosition(1);
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}
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// New directional or spot light.
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Light::Light(float px, float py, float pz, float tx, float ty, float tz)
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: Object(LC_OBJECT_LIGHT)
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{
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Initialize();
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float pos[] = { px, py, pz }, target[] = { tx, ty, tz };
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ChangeKey(1, true, pos, LC_LK_POSITION);
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ChangeKey(1, true, target, LC_LK_TARGET);
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m_pTarget = new LightTarget(this);
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UpdatePosition(1);
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}
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void Light::Initialize()
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{
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m_bEnabled = true;
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m_pNext = NULL;
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m_nState = 0;
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m_pTarget = NULL;
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memset(m_strName, 0, sizeof(m_strName));
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mAmbientColor[3] = 1.0f;
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mDiffuseColor[3] = 1.0f;
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mSpecularColor[3] = 1.0f;
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float *values[] = { mPosition, mTargetPosition, mAmbientColor, mDiffuseColor, mSpecularColor,
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&mConstantAttenuation, &mLinearAttenuation, &mQuadraticAttenuation, &mSpotCutoff, &mSpotExponent };
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RegisterKeys(values, light_key_info, LC_LK_COUNT);
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// set the default values
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float ambient[] = { 0, 0, 0 }, diffuse[] = { 0.8f, 0.8f, 0.8f }, specular[] = { 1, 1, 1 };
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float constant = 1, linear = 0, quadratic = 0, cutoff = 30, exponent = 0;
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ChangeKey(1, true, ambient, LC_LK_AMBIENT_COLOR);
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ChangeKey(1, true, diffuse, LC_LK_DIFFUSE_COLOR);
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ChangeKey(1, true, specular, LC_LK_SPECULAR_COLOR);
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ChangeKey(1, true, &constant, LC_LK_CONSTANT_ATTENUATION);
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ChangeKey(1, true, &linear, LC_LK_LINEAR_ATTENUATION);
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ChangeKey(1, true, &quadratic, LC_LK_QUADRATIC_ATTENUATION);
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ChangeKey(1, true, &cutoff, LC_LK_SPOT_CUTOFF);
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ChangeKey(1, true, &exponent, LC_LK_SPOT_EXPONENT);
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}
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Light::~Light()
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{
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delete m_pTarget;
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}
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void Light::CreateName(const Light* pLight)
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{
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int i, max = 0;
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for (; pLight; pLight = pLight->m_pNext)
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{
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if (strncmp(pLight->m_strName, "Light ", 6) == 0)
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{
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if (sscanf(pLight->m_strName + 6, " #%d", &i) == 1)
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{
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if (i > max)
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max = i;
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}
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}
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}
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sprintf(m_strName, "Light #%.2d", max+1);
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}
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void Light::Select(bool bSelecting, bool bFocus, bool bMultiple)
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{
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if (bSelecting == true)
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{
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if (bFocus == true)
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{
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m_nState |= (LC_LIGHT_FOCUSED|LC_LIGHT_SELECTED);
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if (m_pTarget != NULL)
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m_pTarget->Select(false, true, bMultiple);
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}
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else
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m_nState |= LC_LIGHT_SELECTED;
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if (bMultiple == false)
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if (m_pTarget != NULL)
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m_pTarget->Select(false, false, bMultiple);
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}
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else
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{
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if (bFocus == true)
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m_nState &= ~(LC_LIGHT_FOCUSED);
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else
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m_nState &= ~(LC_LIGHT_SELECTED|LC_LIGHT_FOCUSED);
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}
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}
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void Light::SelectTarget(bool bSelecting, bool bFocus, bool bMultiple)
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{
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// TODO: the target should handle this
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if (bSelecting == true)
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{
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if (bFocus == true)
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{
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m_nState |= (LC_LIGHT_TARGET_FOCUSED|LC_LIGHT_TARGET_SELECTED);
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Select(false, true, bMultiple);
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}
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else
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m_nState |= LC_LIGHT_TARGET_SELECTED;
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if (bMultiple == false)
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Select(false, false, bMultiple);
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}
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else
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{
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if (bFocus == true)
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m_nState &= ~(LC_LIGHT_TARGET_FOCUSED);
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else
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m_nState &= ~(LC_LIGHT_TARGET_SELECTED|LC_LIGHT_TARGET_FOCUSED);
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}
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}
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void Light::MinIntersectDist(lcClickLine* ClickLine)
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{
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if (m_pTarget)
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{
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lcVector3 Min = lcVector3(-0.2f, -0.2f, -0.2f);
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lcVector3 Max = lcVector3(0.2f, 0.2f, 0.2f);
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lcVector3 Start = lcMul31(ClickLine->Start, mWorldLight);
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lcVector3 End = lcMul31(ClickLine->End, mWorldLight);
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float Dist;
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if (lcBoundingBoxRayMinIntersectDistance(Min, Max, Start, End, &Dist, NULL) && (Dist < ClickLine->MinDist))
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{
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ClickLine->Closest = this;
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ClickLine->MinDist = Dist;
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}
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m_pTarget->MinIntersectDist(ClickLine);
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}
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else
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{
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float Dist;
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if (lcSphereRayMinIntersectDistance(mPosition, 0.2f, ClickLine->Start, ClickLine->End, &Dist))
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{
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ClickLine->Closest = this;
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ClickLine->MinDist = Dist;
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}
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}
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}
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void Light::Move(unsigned short nTime, bool bAddKey, float dx, float dy, float dz)
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{
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lcVector3 MoveVec(dx, dy, dz);
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if (IsEyeSelected())
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{
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mPosition += MoveVec;
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ChangeKey(nTime, bAddKey, mPosition, LC_LK_POSITION);
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}
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if (IsTargetSelected())
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{
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mTargetPosition += MoveVec;
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ChangeKey(nTime, bAddKey, mTargetPosition, LC_LK_TARGET);
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}
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}
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void Light::UpdatePosition(unsigned short nTime)
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{
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CalculateKeys(nTime);
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if (m_pTarget != NULL)
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{
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lcVector3 frontvec = mTargetPosition - mPosition;
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lcVector3 up(1, 1, 1);
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if (fabs(frontvec[0]) < fabs(frontvec[1]))
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{
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if (fabs(frontvec[0]) < fabs(frontvec[2]))
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up[0] = -(up[1]*frontvec[1] + up[2]*frontvec[2]);
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else
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up[2] = -(up[0]*frontvec[0] + up[1]*frontvec[1]);
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}
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else
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{
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if (fabs(frontvec[1]) < fabs(frontvec[2]))
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up[1] = -(up[0]*frontvec[0] + up[2]*frontvec[2]);
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else
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up[2] = -(up[0]*frontvec[0] + up[1]*frontvec[1]);
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}
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mWorldLight = lcMatrix44LookAt(mPosition, mTargetPosition, up);
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}
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else
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{
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mWorldLight = lcMatrix44Identity();
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mWorldLight.SetTranslation(-mPosition);
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}
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}
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void Light::Render(const lcMatrix44& ViewMatrix, float LineWidth)
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{
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if (m_pTarget != NULL)
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{
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if (IsEyeSelected())
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{
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glLineWidth(LineWidth*2);
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if (m_nState & LC_LIGHT_FOCUSED)
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lcSetColorFocused();
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else
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lcSetColorSelected();
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RenderCone(ViewMatrix);
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glLineWidth(LineWidth);
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}
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else
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{
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lcSetColorLight();
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RenderCone(ViewMatrix);
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}
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if (IsTargetSelected())
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{
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glLineWidth(LineWidth*2);
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if (m_nState & LC_LIGHT_TARGET_FOCUSED)
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lcSetColorFocused();
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else
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lcSetColorSelected();
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RenderTarget();
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glLineWidth(LineWidth);
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}
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else
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{
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lcSetColorLight();
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RenderTarget();
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}
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glLoadMatrixf(ViewMatrix);
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lcSetColorLight();
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lcVector3 Line[2] = { mPosition, mTargetPosition };
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glVertexPointer(3, GL_FLOAT, 0, Line);
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glDrawArrays(GL_LINES, 0, 2);
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if (IsSelected())
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{
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lcMatrix44 ProjectionMatrix, LightMatrix;
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lcVector3 FrontVector(mTargetPosition - mPosition);
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lcVector3 UpVector(1, 1, 1);
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float Length = FrontVector.Length();
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if (fabs(FrontVector[0]) < fabs(FrontVector[1]))
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{
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if (fabs(FrontVector[0]) < fabs(FrontVector[2]))
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UpVector[0] = -(UpVector[1] * FrontVector[1] + UpVector[2] * FrontVector[2]);
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else
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UpVector[2] = -(UpVector[0] * FrontVector[0] + UpVector[1] * FrontVector[1]);
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}
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else
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{
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if (fabs(FrontVector[1]) < fabs(FrontVector[2]))
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UpVector[1] = -(UpVector[0] * FrontVector[0] + UpVector[2] * FrontVector[2]);
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else
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UpVector[2] = -(UpVector[0] * FrontVector[0] + UpVector[1] * FrontVector[1]);
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}
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LightMatrix = lcMatrix44LookAt(mPosition, mTargetPosition, UpVector);
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LightMatrix = lcMatrix44AffineInverse(LightMatrix);
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ProjectionMatrix = lcMatrix44Perspective(2 * mSpotCutoff, 1.0f, 0.01f, Length);
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ProjectionMatrix = lcMatrix44Inverse(ProjectionMatrix);
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glLoadMatrixf(lcMul(ProjectionMatrix, lcMul(LightMatrix, ViewMatrix)));
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// Draw the light cone.
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float Verts[16][3] =
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{
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{ 0.5f, 1.0f, 1.0f },
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{ 1.0f, 0.5f, 1.0f },
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{ 1.0f, -0.5f, 1.0f },
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{ 0.5f, -1.0f, 1.0f },
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{ -0.5f, -1.0f, 1.0f },
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{ -1.0f, -0.5f, 1.0f },
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{ -1.0f, 0.5f, 1.0f },
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{ -0.5f, 1.0f, 1.0f },
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{ 1.0f, 1.0f, -1.0f },
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{ 0.75f, 0.75f, 1.0f },
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{ -1.0f, 1.0f, -1.0f },
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{ -0.75f, 0.75f, 1.0f },
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{ -1.0f, -1.0f, -1.0f },
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{ -0.75f, -0.75f, 1.0f },
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{ 1.0f, -1.0f, -1.0f },
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{ 0.75f, -0.75f, 1.0f }
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};
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glVertexPointer(3, GL_FLOAT, 0, Verts);
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glDrawArrays(GL_LINE_LOOP, 0, 8);
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glDrawArrays(GL_LINES, 8, 8);
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}
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}
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else
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{
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glLoadMatrixf(lcMul(lcMatrix44Translation(mPosition), ViewMatrix));
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if (IsEyeSelected())
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{
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if (m_nState & LC_LIGHT_FOCUSED)
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lcSetColorFocused();
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else
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lcSetColorSelected();
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}
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else
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lcSetColorLight();
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RenderSphere();
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}
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}
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void Light::RenderCone(const lcMatrix44& ViewMatrix)
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{
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lcVector3 FrontVector(mTargetPosition - mPosition);
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lcVector3 UpVector(1, 1, 1);
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float Length = FrontVector.Length();
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if (fabs(FrontVector[0]) < fabs(FrontVector[1]))
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{
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if (fabs(FrontVector[0]) < fabs(FrontVector[2]))
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UpVector[0] = -(UpVector[1] * FrontVector[1] + UpVector[2] * FrontVector[2]);
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else
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UpVector[2] = -(UpVector[0] * FrontVector[0] + UpVector[1] * FrontVector[1]);
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}
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else
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{
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if (fabs(FrontVector[1]) < fabs(FrontVector[2]))
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UpVector[1] = -(UpVector[0] * FrontVector[0] + UpVector[2] * FrontVector[2]);
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else
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UpVector[2] = -(UpVector[0] * FrontVector[0] + UpVector[1] * FrontVector[1]);
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}
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lcMatrix44 LightMatrix = lcMatrix44LookAt(mPosition, mTargetPosition, UpVector);
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LightMatrix = lcMatrix44AffineInverse(LightMatrix);
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LightMatrix.SetTranslation(lcVector3(0, 0, 0));
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lcMatrix44 LightViewMatrix = lcMul(LightMatrix, lcMul(lcMatrix44Translation(mPosition), ViewMatrix));
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glLoadMatrixf(LightViewMatrix);
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float verts[16*3];
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for (int i = 0; i < 8; i++)
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{
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verts[i*6] = verts[i*6+3] = (float)cos((float)i/4 * LC_PI) * 0.3f;
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verts[i*6+1] = verts[i*6+4] = (float)sin((float)i/4 * LC_PI) * 0.3f;
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verts[i*6+2] = 0.3f;
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verts[i*6+5] = -0.3f;
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}
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glVertexPointer(3, GL_FLOAT, 0, verts);
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glDrawArrays(GL_LINES, 0, 16);
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glVertexPointer(3, GL_FLOAT, 6*sizeof(float), verts);
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glDrawArrays(GL_LINE_LOOP, 0, 8);
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glVertexPointer(3, GL_FLOAT, 6*sizeof(float), &verts[3]);
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glDrawArrays(GL_LINE_LOOP, 0, 8);
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float Lines[4][3] =
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{
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{ -0.5f, -0.5f, -0.3f },
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{ 0.5f, -0.5f, -0.3f },
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{ 0.5f, 0.5f, -0.3f },
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{ -0.5f, 0.5f, -0.3f }
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};
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glVertexPointer(3, GL_FLOAT, 0, Lines);
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glDrawArrays(GL_LINE_LOOP, 0, 4);
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glLoadMatrixf(lcMul(lcMatrix44Translation(lcVector3(0, 0, -Length)), LightViewMatrix));
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}
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void Light::RenderTarget()
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{
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float box[24][3] =
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{
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{ 0.2f, 0.2f, 0.2f }, { -0.2f, 0.2f, 0.2f },
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{ -0.2f, 0.2f, 0.2f }, { -0.2f, -0.2f, 0.2f },
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{ -0.2f, -0.2f, 0.2f }, { 0.2f, -0.2f, 0.2f },
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{ 0.2f, -0.2f, 0.2f }, { 0.2f, 0.2f, 0.2f },
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{ 0.2f, 0.2f, -0.2f }, { -0.2f, 0.2f, -0.2f },
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{ -0.2f, 0.2f, -0.2f }, { -0.2f, -0.2f, -0.2f },
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{ -0.2f, -0.2f, -0.2f }, { 0.2f, -0.2f, -0.2f },
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{ 0.2f, -0.2f, -0.2f }, { 0.2f, 0.2f, -0.2f },
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{ 0.2f, 0.2f, 0.2f }, { 0.2f, 0.2f, -0.2f },
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{ -0.2f, 0.2f, 0.2f }, { -0.2f, 0.2f, -0.2f },
|
|
{ -0.2f, -0.2f, 0.2f }, { -0.2f, -0.2f, -0.2f },
|
|
{ 0.2f, -0.2f, 0.2f }, { 0.2f, -0.2f, -0.2f }
|
|
};
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, box);
|
|
glDrawArrays(GL_LINES, 0, 24);
|
|
}
|
|
|
|
void Light::RenderSphere()
|
|
{
|
|
const int Slices = 6;
|
|
const int NumIndices = 3 * Slices + 6 * Slices * (Slices - 2) + 3 * Slices;
|
|
const int NumVertices = (Slices - 1) * Slices + 2;
|
|
const float Radius = 0.2f;
|
|
lcVector3 Vertices[NumVertices];
|
|
lcuint16 Indices[NumIndices];
|
|
|
|
lcVector3* Vertex = Vertices;
|
|
lcuint16* Index = Indices;
|
|
|
|
*Vertex++ = lcVector3(0, 0, Radius);
|
|
|
|
for (int i = 1; i < Slices; i++ )
|
|
{
|
|
float r0 = Radius * sinf(i * (LC_PI / Slices));
|
|
float z0 = Radius * cosf(i * (LC_PI / Slices));
|
|
|
|
for (int j = 0; j < Slices; j++)
|
|
{
|
|
float x0 = r0 * sinf(j * (LC_2PI / Slices));
|
|
float y0 = r0 * cosf(j * (LC_2PI / Slices));
|
|
|
|
*Vertex++ = lcVector3(x0, y0, z0);
|
|
}
|
|
}
|
|
|
|
*Vertex++ = lcVector3(0, 0, -Radius);
|
|
|
|
for (int i = 0; i < Slices - 1; i++ )
|
|
{
|
|
*Index++ = 0;
|
|
*Index++ = 1 + i;
|
|
*Index++ = 1 + i + 1;
|
|
}
|
|
|
|
*Index++ = 0;
|
|
*Index++ = 1;
|
|
*Index++ = 1 + Slices - 1;
|
|
|
|
for (int i = 0; i < Slices - 2; i++ )
|
|
{
|
|
int Row1 = 1 + i * Slices;
|
|
int Row2 = 1 + (i + 1) * Slices;
|
|
|
|
for (int j = 0; j < Slices - 1; j++ )
|
|
{
|
|
*Index++ = Row1 + j;
|
|
*Index++ = Row2 + j + 1;
|
|
*Index++ = Row2 + j;
|
|
|
|
*Index++ = Row1 + j;
|
|
*Index++ = Row1 + j + 1;
|
|
*Index++ = Row2 + j + 1;
|
|
}
|
|
|
|
*Index++ = Row1 + Slices - 1;
|
|
*Index++ = Row2 + 0;
|
|
*Index++ = Row2 + Slices - 1;
|
|
|
|
*Index++ = Row1 + Slices - 1;
|
|
*Index++ = Row2 + 0;
|
|
*Index++ = Row1 + 0;
|
|
}
|
|
|
|
for (int i = 0; i < Slices - 1; i++ )
|
|
{
|
|
*Index++ = (Slices - 1) * Slices + 1;
|
|
*Index++ = (Slices - 1) * (Slices - 1) + i;
|
|
*Index++ = (Slices - 1) * (Slices - 1) + i + 1;
|
|
}
|
|
|
|
*Index++ = (Slices - 1) * Slices + 1;
|
|
*Index++ = (Slices - 1) * (Slices - 1) + (Slices - 2) + 1;
|
|
*Index++ = (Slices - 1) * (Slices - 1);
|
|
|
|
glVertexPointer(3, GL_FLOAT, 0, Vertices);
|
|
glDrawElements(GL_TRIANGLES, NumIndices, GL_UNSIGNED_SHORT, Indices);
|
|
}
|
|
|
|
void Light::Setup(int index)
|
|
{
|
|
GLenum light = (GLenum)(GL_LIGHT0+index);
|
|
|
|
if (!m_bEnabled)
|
|
{
|
|
glDisable(light);
|
|
return;
|
|
}
|
|
|
|
bool Omni = (m_pTarget == NULL);
|
|
bool Spot = (m_pTarget != NULL) && (mSpotCutoff != 180.0f);
|
|
|
|
glEnable(light);
|
|
|
|
glLightfv(light, GL_AMBIENT, mAmbientColor);
|
|
glLightfv(light, GL_DIFFUSE, mDiffuseColor);
|
|
glLightfv(light, GL_SPECULAR, mSpecularColor);
|
|
|
|
if (Omni || Spot)
|
|
{
|
|
glLightf(light, GL_CONSTANT_ATTENUATION, mConstantAttenuation);
|
|
glLightf(light, GL_LINEAR_ATTENUATION, mLinearAttenuation);
|
|
glLightf(light, GL_QUADRATIC_ATTENUATION, mQuadraticAttenuation);
|
|
|
|
lcVector4 Position(mPosition, 1.0f);
|
|
glLightfv(light, GL_POSITION, Position);
|
|
}
|
|
else
|
|
{
|
|
glLightf(light, GL_CONSTANT_ATTENUATION, 1.0f);
|
|
glLightf(light, GL_LINEAR_ATTENUATION, 0.0f);
|
|
glLightf(light, GL_QUADRATIC_ATTENUATION, 0.0f);
|
|
|
|
lcVector4 Position(mPosition, 0.0f);
|
|
glLightfv(light, GL_POSITION, Position);
|
|
}
|
|
|
|
if (Omni)
|
|
{
|
|
lcVector3 Dir(0.0f, 0.0f, 0.0f);
|
|
|
|
glLightf(light, GL_SPOT_CUTOFF, 180.0f);
|
|
glLightf(light, GL_SPOT_EXPONENT, mSpotExponent);
|
|
glLightfv(light, GL_SPOT_DIRECTION, Dir);
|
|
}
|
|
else
|
|
{
|
|
lcVector3 Dir(mTargetPosition - mPosition);
|
|
Dir.Normalize();
|
|
|
|
glLightf(light, GL_SPOT_CUTOFF, mSpotCutoff);
|
|
glLightf(light, GL_SPOT_EXPONENT, mSpotExponent);
|
|
glLightfv(light, GL_SPOT_DIRECTION, Dir);
|
|
}
|
|
}
|