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Working on PBR system

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Moved PBR material loading to example, right decision?
This commit is contained in:
raysan5
2017-07-19 18:55:26 +02:00
parent e8b65422c4
commit 76c6f0b1e6
6 changed files with 390 additions and 293 deletions
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201
src/rlgl.c
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@@ -1957,15 +1957,14 @@ void rlDrawMesh(Mesh mesh, Material material, Matrix transform)
// Bind shader program
glUseProgram(material.shader.id);
// Matrices and other values required by shader
//-----------------------------------------------------
// Calculate and send to shader model matrix (used by PBR shader)
SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_MODEL], transform);
// Upload to shader material.colDiffuse
glUniform4f(material.shader.locs[LOC_COLOR_DIFFUSE], (float)material.maps[MAP_DIFFUSE].color.r/255,
if (material.shader.locs[LOC_COLOR_DIFFUSE] != -1)
glUniform4f(material.shader.locs[LOC_COLOR_DIFFUSE], (float)material.maps[MAP_DIFFUSE].color.r/255,
(float)material.maps[MAP_DIFFUSE].color.g/255,
(float)material.maps[MAP_DIFFUSE].color.b/255,
(float)material.maps[MAP_DIFFUSE].color.a/255);
@@ -1976,6 +1975,9 @@ void rlDrawMesh(Mesh mesh, Material material, Matrix transform)
(float)material.maps[MAP_SPECULAR].color.g/255,
(float)material.maps[MAP_SPECULAR].color.b/255,
(float)material.maps[MAP_SPECULAR].color.a/255);
if (material.shader.locs[LOC_MATRIX_VIEW] != -1) SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_VIEW], modelview);
if (material.shader.locs[LOC_MATRIX_PROJECTION] != -1) SetShaderValueMatrix(material.shader, material.shader.locs[LOC_MATRIX_PROJECTION], projection);
// At this point the modelview matrix just contains the view matrix (camera)
// That's because Begin3dMode() sets it an no model-drawing function modifies it, all use rlPushMatrix() and rlPopMatrix()
@@ -2417,7 +2419,7 @@ Shader LoadShader(char *vsFileName, char *fsFileName)
// Get the location of the named uniform
GLuint location = glGetUniformLocation(shader.id, name);
TraceLog(LOG_INFO, "[SHDR ID %i] Active uniform [%s] set at location: %i", shader.id, name, location);
TraceLog(LOG_DEBUG, "[SHDR ID %i] Active uniform [%s] set at location: %i", shader.id, name, location);
}
#endif
@@ -2529,18 +2531,13 @@ void SetMatrixModelview(Matrix view)
}
// Generate cubemap texture from HDR texture
Texture2D GenTextureCubemap(Texture2D skyHDR, int size)
Texture2D GenTextureCubemap(Shader shader, Texture2D skyHDR, int size)
{
Texture2D cubemap = { 0 };
#define PATH_CUBEMAP_VS "resources/shaders/cubemap.vs" // Path to equirectangular to cubemap vertex shader
#define PATH_CUBEMAP_FS "resources/shaders/cubemap.fs" // Path to equirectangular to cubemap fragment shader
Shader shader = LoadShader(PATH_CUBEMAP_VS, PATH_CUBEMAP_FS);
// Get cubemap shader locations
int projectionLoc = GetShaderLocation(shader, "projection");
int viewLoc = GetShaderLocation(shader, "view");
//int projectionLoc = GetShaderLocation(shader, "projection"); // Already set at SetShaderDefaultLocations()
//int viewLoc = GetShaderLocation(shader, "view"); // Already set at SetShaderDefaultLocations()
int texmapLoc = GetShaderLocation(shader, "equirectangularMap");
SetShaderValuei(shader, texmapLoc, (int[1]){ 0 }, 1); // Set default active texture to 0
@@ -2586,7 +2583,7 @@ Texture2D GenTextureCubemap(Texture2D skyHDR, int size)
glUseProgram(shader.id);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, skyHDR.id);
SetShaderValueMatrix(shader, projectionLoc, fboProjection);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection);
// Note: don't forget to configure the viewport to the capture dimensions
glViewport(0, 0, size, size);
@@ -2594,7 +2591,7 @@ Texture2D GenTextureCubemap(Texture2D skyHDR, int size)
for (unsigned int i = 0; i < 6; i++)
{
SetShaderValueMatrix(shader, viewLoc, fboViews[i]);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, cubemap.id, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GenDrawCube();
@@ -2607,8 +2604,6 @@ Texture2D GenTextureCubemap(Texture2D skyHDR, int size)
glViewport(0, 0, GetScreenWidth(), GetScreenHeight());
//glEnable(GL_CULL_FACE);
UnloadShader(shader);
cubemap.width = size;
cubemap.height = size;
@@ -2616,18 +2611,13 @@ Texture2D GenTextureCubemap(Texture2D skyHDR, int size)
}
// Generate irradiance texture using cubemap data
Texture2D GenTextureIrradiance(Texture2D cubemap, int size)
Texture2D GenTextureIrradiance(Shader shader, Texture2D cubemap, int size)
{
Texture2D irradiance = { 0 };
#define PATH_SKYBOX_VS "resources/shaders/skybox.vs" // Path to skybox vertex shader
#define PATH_IRRADIANCE_FS "resources/shaders/irradiance.fs" // Path to irradiance (GI) calculation fragment shader
Shader shader = LoadShader(PATH_SKYBOX_VS, PATH_IRRADIANCE_FS);
// Get irradiance shader locations
int projectionLoc = GetShaderLocation(shader, "projection");
int viewLoc = GetShaderLocation(shader, "view");
//int projectionLoc = GetShaderLocation(shader, "projection"); // Already set at SetShaderDefaultLocations()
//int viewLoc = GetShaderLocation(shader, "view"); // Already set at SetShaderDefaultLocations()
int texmapLoc = GetShaderLocation(shader, "environmentMap");
// Set up shaders constant values
@@ -2669,7 +2659,7 @@ Texture2D GenTextureIrradiance(Texture2D cubemap, int size)
glUseProgram(shader.id);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id);
SetShaderValueMatrix(shader, projectionLoc, fboProjection);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection);
// Note: don't forget to configure the viewport to the capture dimensions
glViewport(0, 0, size, size);
@@ -2677,7 +2667,7 @@ Texture2D GenTextureIrradiance(Texture2D cubemap, int size)
for (unsigned int i = 0; i < 6; i++)
{
SetShaderValueMatrix(shader, viewLoc, fboViews[i]);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, irradiance.id, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GenDrawCube();
@@ -2688,9 +2678,7 @@ Texture2D GenTextureIrradiance(Texture2D cubemap, int size)
// Reset viewport dimensions to default
glViewport(0, 0, GetScreenWidth(), GetScreenHeight());
UnloadShader(shader);
irradiance.width = size;
irradiance.height = size;
@@ -2698,18 +2686,13 @@ Texture2D GenTextureIrradiance(Texture2D cubemap, int size)
}
// Generate prefilter texture using cubemap data
Texture2D GenTexturePrefilter(Texture2D cubemap, int size)
Texture2D GenTexturePrefilter(Shader shader, Texture2D cubemap, int size)
{
Texture2D prefilter = { 0 };
#define PATH_SKYBOX_VS "resources/shaders/skybox.vs" // Path to skybox vertex shader
#define PATH_PREFILTER_FS "resources/shaders/prefilter.fs" // Path to reflection prefilter calculation fragment shader
Shader shader = LoadShader(PATH_SKYBOX_VS, PATH_PREFILTER_FS);
// Get prefilter shader locations
int projectionLoc = GetShaderLocation(shader, "projection");
int viewLoc = GetShaderLocation(shader, "view");
//int projectionLoc = GetShaderLocation(shader, "projection"); // Already set at SetShaderDefaultLocations()
//int viewLoc = GetShaderLocation(shader, "view"); // Already set at SetShaderDefaultLocations()
int roughnessLoc = GetShaderLocation(shader, "roughness");
int texmapLoc = GetShaderLocation(shader, "environmentMap");
@@ -2754,7 +2737,7 @@ Texture2D GenTexturePrefilter(Texture2D cubemap, int size)
glUseProgram(shader.id);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, cubemap.id);
SetShaderValueMatrix(shader, projectionLoc, fboProjection);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_PROJECTION], fboProjection);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
@@ -2775,7 +2758,7 @@ Texture2D GenTexturePrefilter(Texture2D cubemap, int size)
for (unsigned int i = 0; i < 6; ++i)
{
SetShaderValueMatrix(shader, viewLoc, fboViews[i]);
SetShaderValueMatrix(shader, shader.locs[LOC_MATRIX_VIEW], fboViews[i]);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, prefilter.id, mip);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
GenDrawCube();
@@ -2787,9 +2770,7 @@ Texture2D GenTexturePrefilter(Texture2D cubemap, int size)
// Reset viewport dimensions to default
glViewport(0, 0, GetScreenWidth(), GetScreenHeight());
UnloadShader(shader);
prefilter.width = size;
prefilter.height = size;
@@ -2797,15 +2778,10 @@ Texture2D GenTexturePrefilter(Texture2D cubemap, int size)
}
// Generate BRDF texture using cubemap data
Texture2D GenTextureBRDF(Texture2D cubemap, int size)
Texture2D GenTextureBRDF(Shader shader, Texture2D cubemap, int size)
{
Texture2D brdf = { 0 };
#define PATH_BRDF_VS "resources/shaders/brdf.vs" // Path to bidirectional reflectance distribution function vertex shader
#define PATH_BRDF_FS "resources/shaders/brdf.fs" // Path to bidirectional reflectance distribution function fragment shader
Shader shader = LoadShader(PATH_BRDF_VS, PATH_BRDF_FS);
// Generate BRDF convolution texture
glGenTextures(1, &brdf.id);
glBindTexture(GL_TEXTURE_2D, brdf.id);
@@ -2835,8 +2811,6 @@ Texture2D GenTextureBRDF(Texture2D cubemap, int size)
// Reset viewport dimensions to default
glViewport(0, 0, GetScreenWidth(), GetScreenHeight());
UnloadShader(shader);
brdf.width = size;
brdf.height = size;
@@ -3380,6 +3354,8 @@ static void SetShaderDefaultLocations(Shader *shader)
// Get handles to GLSL uniform locations (vertex shader)
shader->locs[LOC_MATRIX_MVP] = glGetUniformLocation(shader->id, "mvpMatrix");
shader->locs[LOC_MATRIX_PROJECTION] = glGetUniformLocation(shader->id, "projection");
shader->locs[LOC_MATRIX_VIEW] = glGetUniformLocation(shader->id, "view");
// Get handles to GLSL uniform locations (fragment shader)
shader->locs[LOC_COLOR_DIFFUSE] = glGetUniformLocation(shader->id, "colDiffuse");
@@ -3894,9 +3870,9 @@ static void GenDrawQuad(void)
// Link vertex attributes
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), (GLvoid*)0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(GLfloat), (GLvoid*)(3*sizeof(GLfloat)));
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void *)(3*sizeof(float)));
// Draw quad
glBindVertexArray(quadVAO);
@@ -3908,79 +3884,76 @@ static void GenDrawQuad(void)
}
// Renders a 1x1 3D cube in NDC
GLuint cubeVAO = 0;
GLuint cubeVBO = 0;
static void GenDrawCube(void)
{
// Lazy initialization
if (cubeVAO == 0)
{
GLfloat vertices[] = {
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f , 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f
};
unsigned int cubeVAO = 0;
unsigned int cubeVBO = 0;
// Set up cube VAO
glGenVertexArrays(1, &cubeVAO);
glGenBuffers(1, &cubeVBO);
float vertices[] = {
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
-1.0f, -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, 1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 1.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 0.0f,
-1.0f, -1.0f, -1.0f, 0.0f, -1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
1.0f, 1.0f , 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f,
-1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f,
-1.0f, 1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f
};
// Fill buffer
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Set up cube VAO
glGenVertexArrays(1, &cubeVAO);
glGenBuffers(1, &cubeVBO);
// Link vertex attributes
glBindVertexArray(cubeVAO);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8*sizeof(GLfloat), (GLvoid*)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8*sizeof(GLfloat), (GLvoid*)(3*sizeof(GLfloat)));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8*sizeof(GLfloat), (GLvoid*)(6*sizeof(GLfloat)));
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
}
// Fill buffer
glBindBuffer(GL_ARRAY_BUFFER, cubeVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
// Link vertex attributes
glBindVertexArray(cubeVAO);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)0);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(3*sizeof(float)));
glEnableVertexAttribArray(2);
glVertexAttribPointer(2, 2, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void *)(6*sizeof(float)));
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);
// Draw cube
glBindVertexArray(cubeVAO);
glDrawArrays(GL_TRIANGLES, 0, 36);
glBindVertexArray(0);
//glDeleteBuffers(1, &cubeVBO);
//glDeleteVertexArrays(1, &cubeVAO);
glDeleteBuffers(1, &cubeVBO);
glDeleteVertexArrays(1, &cubeVAO);
}
#if defined(SUPPORT_VR_SIMULATOR)