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Add shader for projective texture.

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This commit is contained in:
yunfeibai
2018-02-11 21:29:02 -08:00
parent 08548e1ef0
commit 2947cd54ce
10 changed files with 85 additions and 33 deletions
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70
examples/OpenGLWindow/GLInstancingRenderer.cpp
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@@ -16,9 +16,9 @@ subject to the following restrictions:
///todo: make this configurable in the gui
bool useShadowMap = false;// true;//false;//true;
bool useShadowMap = true;// true;//false;//true;
float projectiveTextureViewSize = 10;
bool useProjectiveTexture = true;
bool useProjectiveTexture = false;
int shadowMapWidth= 4096;
int shadowMapHeight= 4096;
float shadowMapWorldSize=10;
@@ -74,6 +74,8 @@ float shadowMapWorldSize=10;
#include "Shaders/createShadowMapInstancingPS.h"
#include "Shaders/useShadowMapInstancingVS.h"
#include "Shaders/useShadowMapInstancingPS.h"
#include "Shaders/projectiveTextureInstancingVS.h"
#include "Shaders/projectiveTextureInstancingPS.h"
#include "Shaders/linesPS.h"
#include "Shaders/linesVS.h"
@@ -250,6 +252,8 @@ struct InternalDataRenderer : public GLInstanceRendererInternalData
{
m_lightPos=b3MakeVector3(-50,30,40);
m_lightSpecularIntensity.setValue(1,1,1);
m_projectorPos=b3MakeVector3(-50,30,40);
//clear to zero to make it obvious if the matrix is used uninitialized
for (int i=0;i<16;i++)
@@ -284,6 +288,7 @@ static GLuint triangleIndexVbo=0;
static GLuint linesShader; // The line renderer
static GLuint useShadowMapInstancingShader; // The shadow instancing renderer
static GLuint createShadowMapInstancingShader; // The shadow instancing renderer
static GLuint projectiveTextureInstancingShader; // The projective texture instancing renderer
static GLuint instancingShader; // The instancing renderer
static GLuint instancingShaderPointSprite; // The point sprite instancing renderer
@@ -321,6 +326,20 @@ static GLint useShadow_shadowMap = 0;
static GLint createShadow_depthMVP=0;
static GLint projectiveTexture_ViewMatrixInverse=0;
static GLint projectiveTexture_ModelViewMatrix=0;
static GLint projectiveTexture_lightSpecularIntensity = 0;
static GLint projectiveTexture_materialSpecularColor = 0;
static GLint projectiveTexture_MVP=0;
static GLint projectiveTexture_lightPosIn=0;
static GLint projectiveTexture_cameraPositionIn = 0;
static GLint projectiveTexture_materialShininessIn = 0;
static GLint projectiveTexture_ProjectionMatrix=0;
static GLint projectiveTexture_DepthBiasModelViewMatrix=0;
static GLint projectiveTexture_uniform_texture_diffuse = 0;
static GLint projectiveTexture_shadowMap = 0;
static GLint ModelViewMatrix=0;
static GLint ProjectionMatrix=0;
static GLint regularLightDirIn=0;
@@ -1212,7 +1231,24 @@ void GLInstancingRenderer::InitShaders()
glGetIntegerv(GL_SMOOTH_LINE_WIDTH_RANGE, lineWidthRange);
projectiveTextureInstancingShader = gltLoadShaderPair(projectiveTextureInstancingVertexShader,projectiveTextureInstancingFragmentShader);
glLinkProgram(projectiveTextureInstancingShader);
glUseProgram(projectiveTextureInstancingShader);
projectiveTexture_ViewMatrixInverse = glGetUniformLocation(projectiveTextureInstancingShader, "ViewMatrixInverse");
projectiveTexture_ModelViewMatrix = glGetUniformLocation(projectiveTextureInstancingShader, "ModelViewMatrix");
projectiveTexture_lightSpecularIntensity = glGetUniformLocation(projectiveTextureInstancingShader, "lightSpecularIntensityIn");
projectiveTexture_materialSpecularColor = glGetUniformLocation(projectiveTextureInstancingShader, "materialSpecularColorIn");
projectiveTexture_MVP = glGetUniformLocation(projectiveTextureInstancingShader, "MVP");
projectiveTexture_ProjectionMatrix = glGetUniformLocation(projectiveTextureInstancingShader, "ProjectionMatrix");
projectiveTexture_DepthBiasModelViewMatrix = glGetUniformLocation(projectiveTextureInstancingShader, "DepthBiasModelViewProjectionMatrix");
projectiveTexture_uniform_texture_diffuse = glGetUniformLocation(projectiveTextureInstancingShader, "Diffuse");
projectiveTexture_shadowMap = glGetUniformLocation(projectiveTextureInstancingShader,"shadowMap");
projectiveTexture_lightPosIn = glGetUniformLocation(projectiveTextureInstancingShader,"lightPosIn");
projectiveTexture_cameraPositionIn = glGetUniformLocation(projectiveTextureInstancingShader,"cameraPositionIn");
projectiveTexture_materialShininessIn = glGetUniformLocation(projectiveTextureInstancingShader,"materialShininessIn");
glUseProgram(0);
useShadowMapInstancingShader = gltLoadShaderPair(useShadowMapInstancingVertexShader,useShadowMapInstancingFragmentShader);
@@ -1538,7 +1574,7 @@ void GLInstancingRenderer::renderScene()
}
else if (useProjectiveTexture)
{
renderSceneInternal(B3_CREATE_SHADOWMAP_RENDERMODE);
//renderSceneInternal(B3_CREATE_SHADOWMAP_RENDERMODE);
renderSceneInternal(B3_USE_PROJECTIVE_TEXTURE_RENDERMODE);
}
else
@@ -2136,9 +2172,8 @@ void GLInstancingRenderer::renderSceneInternal(int orgRenderMode)
// Compute projection matrix for texture projector
float textureViewMatrix[4][4];
b3Vector3 projectorDir = m_data->m_projectorDir.normalize();
float projectorDist = 3.0;
b3Vector3 projectorUp = b3MakeVector3(0,0,1.0);
b3CreateLookAt(m_data->m_projectorPos, m_data->m_projectorDir*projectorDist, projectorUp, &textureViewMatrix[0][0]);
float projectorDist = 0;
b3CreateLookAt(m_data->m_projectorPos,center,up, &textureViewMatrix[0][0]);
GLfloat textureModelMatrix[4][4];
b3CreateDiagonalMatrix(1.f, textureModelMatrix);
b3Matrix4x4Mul(textureViewMatrix, textureModelMatrix, textureModelViewMatrix);
@@ -2497,6 +2532,7 @@ b3Assert(glGetError() ==GL_NO_ERROR);
}
case B3_USE_PROJECTIVE_TEXTURE_RENDERMODE:
{
printf("PROJECTIVE TEXTURE!!\n");
if ( gfxObj->m_flags&eGfxTransparency)
{
glDepthMask(false);
@@ -2504,10 +2540,10 @@ b3Assert(glGetError() ==GL_NO_ERROR);
glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
glUseProgram(useShadowMapInstancingShader);
glUniformMatrix4fv(useShadow_ProjectionMatrix, 1, false, &m_data->m_projectionMatrix[0]);
glUniform3f(useShadow_lightSpecularIntensity, m_data->m_lightSpecularIntensity[0],m_data->m_lightSpecularIntensity[1],m_data->m_lightSpecularIntensity[2]);
glUniform3f(useShadow_materialSpecularColor, gfxObj->m_materialSpecularColor[0],gfxObj->m_materialSpecularColor[1],gfxObj->m_materialSpecularColor[2]);
glUseProgram(projectiveTextureInstancingShader);
glUniformMatrix4fv(projectiveTexture_ProjectionMatrix, 1, false, &m_data->m_projectionMatrix[0]);
glUniform3f(projectiveTexture_lightSpecularIntensity, m_data->m_lightSpecularIntensity[0],m_data->m_lightSpecularIntensity[1],m_data->m_lightSpecularIntensity[2]);
glUniform3f(projectiveTexture_materialSpecularColor, gfxObj->m_materialSpecularColor[0],gfxObj->m_materialSpecularColor[1],gfxObj->m_materialSpecularColor[2]);
float MVP[16];
if (reflectionPass)
@@ -2526,17 +2562,17 @@ b3Assert(glGetError() ==GL_NO_ERROR);
glCullFace(GL_BACK);
}
glUniformMatrix4fv(useShadow_MVP, 1, false, &MVP[0]);
glUniform3f(useShadow_lightPosIn,m_data->m_lightPos[0],m_data->m_lightPos[1],m_data->m_lightPos[2]);
glUniformMatrix4fv(projectiveTexture_MVP, 1, false, &MVP[0]);
glUniform3f(projectiveTexture_lightPosIn,m_data->m_lightPos[0],m_data->m_lightPos[1],m_data->m_lightPos[2]);
float camPos[3];
m_data->m_activeCamera->getCameraPosition(camPos);
glUniform3f(useShadow_cameraPositionIn,camPos[0],camPos[1],camPos[2]);
glUniform1f(useShadow_materialShininessIn,gfxObj->m_materialShinyNess);
glUniform3f(projectiveTexture_cameraPositionIn,camPos[0],camPos[1],camPos[2]);
glUniform1f(projectiveTexture_materialShininessIn,gfxObj->m_materialShinyNess);
glUniformMatrix4fv(useShadow_DepthBiasModelViewMatrix, 1, false, &textureMVP[0][0]);
glUniformMatrix4fv(projectiveTexture_DepthBiasModelViewMatrix, 1, false, &textureMVP[0][0]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, m_data->m_shadowTexture);
glUniform1i(useShadow_shadowMap,1);
glUniform1i(projectiveTexture_shadowMap,1);
//sort transparent objects
if ( gfxObj->m_flags&eGfxTransparency)