GLUSboolean update(GLUSfloat time)
{
static GLfloat angle = 0.0f;
GLfloat depthPassMatrix[16];
GLfloat modelViewMatrix[16];
GLfloat viewMatrix[16];
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
// Rendering into the depth pass texture.
glBindTexture(GL_TEXTURE_2D, 0);
// Setup for the framebuffer.
glBindFramebuffer(GL_FRAMEBUFFER, g_fbo);
glViewport(0, 0, g_depthPassTextureSize, g_depthPassTextureSize);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
glusMatrix4x4LookAtf(viewMatrix, g_lightPosition[0], g_lightPosition[1], g_lightPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glusMatrix4x4Multiplyf(depthPassMatrix, g_depthPassMatrix, viewMatrix);
glClear(GL_DEPTH_BUFFER_BIT);
glUseProgram(g_programDepthPass.program);
// Render the Dragon.
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
// Upscaling a little bit avoids artifacts.
glusMatrix4x4Scalef(modelMatrix, 1.05f, 1.05f, 1.05f);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glUniformMatrix4fv(g_modelViewMatrixDepthPassLocation, 1, GL_FALSE, modelViewMatrix);
glBindVertexArray(g_vaoDepthPass);
glDrawArrays(GL_TRIANGLES, 0, g_numberVertices);
// Revert for the scene.
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glViewport(0, 0, g_width, g_height);
glBindTexture(GL_TEXTURE_2D, g_depthPassTexture);
//
// Render the scene.
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(g_program.program);
glusMatrix4x4LookAtf(viewMatrix, g_cameraPosition[0], g_cameraPosition[1], g_cameraPosition[2], 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
glUniformMatrix4fv(g_viewMatrixLocation, 1, GL_FALSE, viewMatrix);
glUniformMatrix4fv(g_depthPassMatrixLocation, 1, GL_FALSE, depthPassMatrix);
// Dragon
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4RotateRzRxRyf(modelMatrix, 0.0f, 0.0f, angle);
glusMatrix4x4Multiplyf(modelViewMatrix, viewMatrix, modelMatrix);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelViewMatrix);
glUniformMatrix4fv(g_modelMatrixLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixLocation, 1, GL_FALSE, normalMatrix);
glUniform4f(g_diffuseColorLocation, 0.8f, 0.0f, 0.0f, 1.0f);
glUniform4f(g_scatterColorLocation, 0.8f, 0.8f, 0.0f, 1.0f);
glUniform2f(g_nearFarLocation, g_near, g_far);
glUniform1f(g_wrapLocation, g_wrap);
glUniform1f(g_scatterWidthLocation, g_scatterWidth);
glUniform1f(g_scatterFalloffLocation, g_scatterFalloff);
glBindVertexArray(g_vao);
glDrawArrays(GL_TRIANGLES, 0, g_numberVertices);
//
angle += 20.0f * time;
return GLUS_TRUE;
}
GLUSboolean update(GLUSfloat time)
{
// Bias needed to convert the from [-1;1] to [0;1]
GLfloat biasMatrix[16] = {0.5f, 0.0f, 0.0f, 0.0f,
0.0f, 0.5f, 0.0f, 0.0f,
0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f};
// Frame buffer has another view port and so perspective projection. Needed for projected texturing of the mirror texture.
GLfloat viewProjectionBiasTextureMatrix[16];
// This matrix is used to flip the rendered object upside down.
GLfloat scaleMatrix[16];
// Store current width and height for later reseting.
GLuint width = g_width;
GLuint height = g_height;
//
// Upside down rendering to frame buffer.
//
glBindFramebuffer(GL_FRAMEBUFFER, g_fboMirrorTexture);
reshape(TEXTURE_WIDTH, TEXTURE_HEIGHT);
glClearColor(1.0f, 1.0f, 1.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glusMatrix4x4Identityf(scaleMatrix);
glusMatrix4x4Scalef(scaleMatrix, 1.0f, -1.0f, 1.0f);
glFrontFace(GL_CW);
if (!updateWavefront(time, scaleMatrix))
{
return GLUS_FALSE;
}
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// Save the current projection matrix for later usage.
glusMatrix4x4Copyf(viewProjectionBiasTextureMatrix, g_viewProjectionMatrix, GLUS_FALSE);
glusMatrix4x4Multiplyf(viewProjectionBiasTextureMatrix, biasMatrix, viewProjectionBiasTextureMatrix);
//
// Scene rendering
//
reshape(width, height);
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Normal rendering
glusMatrix4x4Identityf(scaleMatrix);
glFrontFace(GL_CCW);
if (!updateWavefront(time, scaleMatrix))
{
return GLUS_FALSE;
}
glUseProgram(g_program.program);
// This matrix is needed to calculate the vertices into the frame buffer render pass.
glUniformMatrix4fv(g_viewProjectionBiasTextureMatrixLocation, 1, GL_FALSE, viewProjectionBiasTextureMatrix);
glBindVertexArray(g_vao);
glDrawElements(GL_TRIANGLES, g_numberIndicesSphere, GL_UNSIGNED_INT, 0);
return GLUS_TRUE;
}
GLUSboolean update(GLUSfloat time)
{
GLfloat modelMatrix[16];
GLfloat normalMatrix[9];
//
// Render to FBO.
//
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARRAY, g_texture[0]);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_CUBE_MAP, g_texture[1]);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_2D, g_texture[2]);
glActiveTexture(GL_TEXTURE0);
glBindFramebuffer(GL_FRAMEBUFFER, g_fullscreenFBO);
glEnable(GL_MULTISAMPLE);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Render the background.
// Rendering the sphere from inside, so change front facing.
glFrontFace(GL_CW);
glUseProgram(g_backgroundProgram.program);
glUniformMatrix4fv(g_viewProjectionMatrixBackgroundLocation, 1, GL_FALSE, g_viewProjectionMatrix);
glBindVertexArray(g_backgroundVAO);
glDrawElements(GL_TRIANGLES, g_numberIndicesBackground, GL_UNSIGNED_INT, 0);
glFrontFace(GL_CCW);
// Render model using BRDF and IBL.
glusMatrix4x4Identityf(modelMatrix);
glusMatrix4x4Scalef(modelMatrix, 0.001f, 0.001f, 0.001f);
glusMatrix4x4ExtractMatrix3x3f(normalMatrix, modelMatrix);
glUseProgram(g_modelProgram.program);
glBindVertexArray(g_modelVAO);
// Roughness of material.
glUniform1f(g_roughnessMaterialModelLocation, g_roughness);
glUniform1f(g_R0MaterialModelLocation, g_R0);
glUniform3fv(g_colorMaterialModelLocation, 1, g_colorMaterial);
glUniformMatrix4fv(g_viewProjectionMatrixModelLocation, 1, GL_FALSE, g_viewProjectionMatrix);
glUniformMatrix4fv(g_modelMatrixModelLocation, 1, GL_FALSE, modelMatrix);
glUniformMatrix3fv(g_normalMatrixModelLocation, 1, GL_FALSE, normalMatrix);
glDrawArrays(GL_TRIANGLES, 0, g_numberVerticesModel);
//
// Render full screen to resolve the buffer: MSAA, tone mapping and gamma correction.
//
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, g_fullscreenTexture);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDisable(GL_MULTISAMPLE);
// No clear needed, as we just draw over the last content.
glDisable(GL_DEPTH_TEST);
glUseProgram(g_fullscreenProgram.program);
glUniform1f(g_exposureFullscreenLocation, g_exposure);
glUniform1f(g_gammaFullscreenLocation, g_gamma);
glBindVertexArray(g_fullscreenVAO);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glEnable(GL_DEPTH_TEST);
return GLUS_TRUE;
}
GLUSboolean init(GLUSvoid)
{
GLfloat textureToWorldNormalMatrix[16];
// The maximum detail level which is 2^s = sMapExtend.
GLuint sMaxDetailLevel;
// The maximum detail level which is 2^t = tMapExtend.
GLuint tMaxDetailLevel;
// The overall maximum detail level from s and t.
GLuint overallMaxDetailLevel;
// Step for s and t direction.
GLfloat detailStep;
GLuint s, t;
GLUStgaimage image;
GLfloat* map = 0;
GLuint* indices = 0;
GLUStextfile vertexSource;
GLUStextfile controlSource;
GLUStextfile evaluationSource;
GLUStextfile geometrySource;
GLUStextfile fragmentSource;
GLfloat lightDirection[3] = { 1.0f, 1.0f, 1.0f };
glusVector3Normalizef(lightDirection);
g_topView.cameraPosition[0] = 0.0f;
g_topView.cameraPosition[1] = 30000.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_topView.cameraPosition[2] = 0.0f;
g_topView.cameraPosition[3] = 1.0;
g_topView.cameraDirection[0] = 0.0f;
g_topView.cameraDirection[1] = -1.0f;
g_topView.cameraDirection[2] = 0.0f;
g_topView.cameraUp[0] = 0.0f;
g_topView.cameraUp[1] = 0.0f;
g_topView.cameraUp[2] = -1.0f;
g_topView.fov = 40.0f;
g_personView.cameraPosition[0] = 0.0f;
g_personView.cameraPosition[1] = 4700.0f * METERS_TO_VIRTUAL_WORLD_SCALE;
g_personView.cameraPosition[2] = 0.0f;
g_personView.cameraPosition[3] = 1.0;
g_personView.cameraDirection[0] = 0.0f;
g_personView.cameraDirection[1] = 0.0f;
g_personView.cameraDirection[2] = -1.0f;
g_personView.cameraUp[0] = 0.0f;
g_personView.cameraUp[1] = 1.0f;
g_personView.cameraUp[2] = 0.0f;
g_personView.fov = 60.0f;
g_activeView = &g_personView;
if (!glusLoadTgaImage(NORMAL_MAP, &image))
{
printf("Could not load normal picture '%s'!\n", NORMAL_MAP);
return GLUS_FALSE;
}
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &g_normalMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glusDestroyTgaImage(&image);
if (!glusLoadTgaImage(HEIGHT_MAP, &image))
{
printf("Could not load height picture '%s'!\n", HEIGHT_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_heightMapTexture);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glTexImage2D(GL_TEXTURE_RECTANGLE, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
g_sMapExtend = (GLfloat) image.width;
g_tMapExtend = (GLfloat) image.height;
glusDestroyTgaImage(&image);
// Calculate the detail level for the s and ...
sMaxDetailLevel = (GLuint) floorf(logf(g_sMapExtend) / logf(2.0f));
// ... t extend
tMaxDetailLevel = (GLuint) floorf(logf(g_tMapExtend) / logf(2.0f));
overallMaxDetailLevel = glusMinf(sMaxDetailLevel, tMaxDetailLevel);
// Do checking of calculated parameters
if (MINIMUM_DETAIL_LEVEL > overallMaxDetailLevel)
{
printf("Detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS > overallMaxDetailLevel)
{
printf("First pass detail level to high %d > %d\n", MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS, overallMaxDetailLevel);
return GLUS_FALSE;
}
if (powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)) > 32.0f)
{
printf("Tessellation level to high %d > 32\n", (GLint) powf(2.0f, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS)));
return GLUS_FALSE;
}
detailStep = powf(2.0f, overallMaxDetailLevel - MINIMUM_DETAIL_LEVEL);
g_sNumPoints = (GLuint) ceilf(g_sMapExtend / detailStep) - 1;
g_tNumPoints = (GLuint) ceilf(g_tMapExtend / detailStep) - 1;
//
// Generate the flat terrain mesh.
//
map = (GLUSfloat*) malloc(g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat));
indices = (GLuint*) malloc(g_sNumPoints * g_tNumPoints * sizeof(GLuint));
for (t = 0; t < g_tNumPoints; t++)
{
for (s = 0; s < g_sNumPoints; s++)
{
map[t * g_sNumPoints * 2 + s * 2 + 0] = 0.5f + detailStep / 2.0f + (GLfloat) s * detailStep;
map[t * g_sNumPoints * 2 + s * 2 + 1] = 0.5f + detailStep / 2.0f + (GLfloat) t * detailStep;
indices[t * g_sNumPoints + s + 0] = (t + 0) * g_sNumPoints + s + 0;
}
}
//
// Transferring vertices and indices into GPU
//
// Pass one
glGenBuffers(1, &g_verticesPassOneVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * 2 * sizeof(GLfloat), map, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenBuffers(1, &g_indicesPassOneVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * sizeof(GLuint), indices, GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
// Pass two.
glGenBuffers(1, &g_verticesPassTwoVBO);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// Calculate enough space!
glBufferData(GL_ARRAY_BUFFER, g_sNumPoints * g_tNumPoints * (GLuint) pow(4, DETAIL_LEVEL_FIRST_PASS + 1) * 2 * sizeof(GLfloat), 0, GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, 0);
//
free(map);
map = 0;
free(indices);
indices = 0;
//
if (!glusLoadTgaImage(COLOR_MAP, &image))
{
printf("Could not load color picture '%s'!\n", COLOR_MAP);
return GLUS_FALSE;
}
glGenTextures(1, &g_colorMapTexture);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glTexImage2D(GL_TEXTURE_2D, 0, image.format, image.width, image.height, 0, image.format, GL_UNSIGNED_BYTE, image.data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glusDestroyTgaImage(&image);
//
glGenQueries(1, &g_transformFeedbackQuery);
//
// Creating the shader program.
//
// Pass one.
glusLoadTextFile("../Example14/shader/PassOne.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassOne.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassOne.frag.glsl", &fragmentSource);
// Compile and ...
glusCreateProgramFromSource(&g_programPassOne, (const GLUSchar**) &vertexSource.text, 0, 0, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text);
// ... add the transform variable ...
glTransformFeedbackVaryings(g_programPassOne.program, 1, (const GLchar**) &TRANSFORM_VARYING, GL_SEPARATE_ATTRIBS);
// ... and link the program
if (!glusLinkProgram(&g_programPassOne))
{
printf("Could not build program one\n");
return GLUS_FALSE;
}
// Destroy the text resource
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_halfDetailStepPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_halfDetailStep");
g_detailLevelPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_detailLevel");
g_fovRadiusPassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_fovRadius");
g_positionTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_positionTextureSpace");
g_leftNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_leftNormalTextureSpace");
g_rightNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_rightNormalTextureSpace");
g_backNormalTextureSpacePassOneLocation = glGetUniformLocation(g_programPassOne.program, "u_backNormalTextureSpace");
// Pass two.
glusLoadTextFile("../Example14/shader/PassTwo.vert.glsl", &vertexSource);
glusLoadTextFile("../Example14/shader/PassTwo.cont.glsl", &controlSource);
glusLoadTextFile("../Example14/shader/PassTwo.eval.glsl", &evaluationSource);
glusLoadTextFile("../Example14/shader/PassTwo.geom.glsl", &geometrySource);
glusLoadTextFile("../Example14/shader/PassTwo.frag.glsl", &fragmentSource);
if (!glusBuildProgramFromSource(&g_shaderProgramPassTwo, (const GLUSchar**) &vertexSource.text, (const GLUSchar**) &controlSource.text, (const GLUSchar**) &evaluationSource.text, (const GLUSchar**) &geometrySource.text, (const GLUSchar**) &fragmentSource.text))
{
printf("Could not build program two\n");
return GLUS_FALSE;
}
glusDestroyTextFile(&vertexSource);
glusDestroyTextFile(&controlSource);
glusDestroyTextFile(&evaluationSource);
glusDestroyTextFile(&geometrySource);
glusDestroyTextFile(&fragmentSource);
g_maxTessellationLevelPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_maxTessellationLevel");
g_quadrantStepPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_quadrantStep");
g_positionTextureSpacePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_positionTextureSpace");
g_heightMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_heightMapTexture");
g_normalMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_normalMapTexture");
g_tmvpPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_tmvpMatrix");
g_lightDirectionPassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_lightDirection");
g_colorMapTexturePassTwoLocation = glGetUniformLocation(g_shaderProgramPassTwo.program, "u_colorMapTexture");
//
// One time matrix calculations to convert between texture and world space
glusMatrix4x4Identityf(g_textureToWorldMatrix);
glusMatrix4x4Identityf(textureToWorldNormalMatrix);
glusMatrix4x4Scalef(g_textureToWorldMatrix, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE, VERTICAL_PIXEL_RANGE * METERS_TO_VIRTUAL_WORLD_SCALE, HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
// Skip this scale for the normal matrix
glusMatrix4x4Scalef(g_textureToWorldMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Scalef(textureToWorldNormalMatrix, 1.0f, 1.0f, -1.0f);
glusMatrix4x4Translatef(g_textureToWorldMatrix, -g_sMapExtend / 2.0f, 0.0f, -g_tMapExtend / 2.0f);
// No need for the translation matrix in the normal matrix
glusMatrix4x4Copyf(g_worldToTextureMatrix, g_textureToWorldMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureMatrix);
glusMatrix4x4Copyf(g_worldToTextureNormalMatrix, textureToWorldNormalMatrix, GLUS_FALSE);
glusMatrix4x4Inversef(g_worldToTextureNormalMatrix);
// Pass one
glUseProgram(g_programPassOne.program);
glUniform1f(g_halfDetailStepPassOneLocation, detailStep / 2.0f);
glUniform1ui(g_detailLevelPassOneLocation, DETAIL_LEVEL_FIRST_PASS);
glUniform1f(g_fovRadiusPassOneLocation, FOV_RADIUS / HORIZONTAL_PIXEL_SPACING * METERS_TO_VIRTUAL_WORLD_SCALE);
glGenVertexArrays(1, &g_vaoPassOne);
glBindVertexArray(g_vaoPassOne);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassOneVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, g_indicesPassOneVBO);
// Pass two
glUseProgram(g_shaderProgramPassTwo.program);
glUniform3fv(g_lightDirectionPassTwoLocation, 1, lightDirection);
glUniform1ui(g_maxTessellationLevelPassTwoLocation, overallMaxDetailLevel - (MINIMUM_DETAIL_LEVEL + DETAIL_LEVEL_FIRST_PASS));
glUniform1i(g_quadrantStepPassTwoLocation, QUADRANT_STEP);
glGenVertexArrays(1, &g_vaoPassTwo);
glBindVertexArray(g_vaoPassTwo);
glBindBuffer(GL_ARRAY_BUFFER, g_verticesPassTwoVBO);
// First 0 is the location = 0. See shader source
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
// Enable location = 0
glEnableVertexAttribArray(0);
//
glActiveTexture(GL_TEXTURE0);
glUniform1i(g_heightMapTexturePassTwoLocation, 0);
glBindTexture(GL_TEXTURE_RECTANGLE, g_heightMapTexture);
glActiveTexture(GL_TEXTURE1);
glUniform1i(g_colorMapTexturePassTwoLocation, 1);
glBindTexture(GL_TEXTURE_2D, g_colorMapTexture);
glActiveTexture(GL_TEXTURE2);
glUniform1i(g_normalMapTexturePassTwoLocation, 2);
glBindTexture(GL_TEXTURE_RECTANGLE, g_normalMapTexture);
//
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glPatchParameteri(GL_PATCH_VERTICES, 4);
return GLUS_TRUE;
}
void Matrix4x4::scale(float sx, float sy, float sz)
{
glusMatrix4x4Scalef(m, sx, sy, sz);
}
