itdominator/SWBF2-Classic-Msh-Viewer
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still trying to draw instanced

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This commit is contained in:
Anakin
2016-11-07 12:06:55 +01:00
parent 8a36fe10b1
commit ed66d77b69
4 changed files with 22 additions and 17 deletions
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31
MshViewer/Source/OpenGlController.cpp
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@@ -188,7 +188,7 @@ void OpenGLController::setCallbackFunctions()
glfwSetKeyCallback(pWindow, keyPress);
}
glm::mat4 OpenGLController::getMVPMatrix()
glm::mat4 OpenGLController::getMVPMatrix(unsigned int index)
{
// Projection
glm::mat4 m4x4Projection = glm::perspective(fFOV, float(iWidth) / float(iHeight), fMinView, fMaxView);
@@ -202,7 +202,7 @@ glm::mat4 OpenGLController::getMVPMatrix()
// Model
//TODO for all
glm::mat4 m4x4Model = vModels.front()->m4x4Translation;
glm::mat4 m4x4Model = vModels[index]->m4x4Translation;
// User controlled rotation
glm::mat4 m4x4ModelRot = glm::mat4(1.0f);
@@ -266,23 +266,28 @@ void OpenGLController::updateScene()
// use shader prgm
glUseProgram(gluiShaderPrgmID);
// fill vector with MVPs of all Models (only 1 for testing)
std::vector<glm::mat4> mvpMatrices;
mvpMatrices.push_back(getMVPMatrix());
// give the MVPs to the shader
glBindBuffer(GL_UNIFORM_BUFFER, gluiInstanceBufferID);
glBufferSubData(GL_UNIFORM_BUFFER, sizeof(glm::mat4) * mvpMatrices.size(), NULL, mvpMatrices.data());
glBindBuffer(GL_UNIFORM_BUFFER, 0);
// bind texture in texture unit 0
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, gluiTextureID);
// tell sampler to use texture unit 0
glUniform1i(gluiSamplerID, 0);
//draw objects hardcoded only 1 instance for testing
glDrawArraysInstanced(GL_TRIANGLES, 0, vModels.front()->meshSize, 1);
int instanceOffset(0);
for (unsigned int modelIndex = 0; modelIndex < vModels.size(); modelIndex++)
{
// give the MVPs to the shader
glBindBuffer(GL_UNIFORM_BUFFER, gluiInstanceBufferID);
glBufferSubData(GL_UNIFORM_BUFFER, sizeof(glm::mat4), NULL, &getMVPMatrix(0));
glBindBuffer(GL_UNIFORM_BUFFER, 0);
//glUniformMatrix4fv(gluiMatrixID, 1, GL_FALSE, &getMVPMatrix(modelIndex)[0][0]);
//draw objects hardcoded only 1 instance for testing
glDrawArraysInstanced(GL_TRIANGLES, instanceOffset, vModels[modelIndex]->meshSize, vModels.size());
instanceOffset += vModels[modelIndex]->meshSize;
}
glfwSwapBuffers(pWindow);
glfwPollEvents();