JNIEXPORT void JNICALL Java_org_lwjgl_opengl_ARBIndirectParameters_nglMultiDrawArraysIndirectCountARB(JNIEnv *env, jclass clazz, jint mode, jlong indirect, jlong drawcount, jint maxdrawcount, jint stride, jlong function_pointer) {
const GLvoid *indirect_address = (const GLvoid *)(intptr_t)indirect;
glMultiDrawArraysIndirectCountARBPROC glMultiDrawArraysIndirectCountARB = (glMultiDrawArraysIndirectCountARBPROC)((intptr_t)function_pointer);
glMultiDrawArraysIndirectCountARB(mode, indirect_address, drawcount, maxdrawcount, stride);
}
void cullindirect_app::render(double currentTime)
{
static const GLfloat farplane[] = { 1.0f };
static float lastTime = 0.0f;
static int frames = 0;
float nowTime = float(currentTime);
int i;
// Set viewport and clear
glViewport(0, 0, info.windowWidth, info.windowHeight);
glClearBufferfv(GL_COLOR, 0, sb7::color::Black);
glClearBufferfv(GL_DEPTH, 0, farplane);
// Bind and clear atomic counter
glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, buffers.parameters);
glClearBufferSubData(GL_ATOMIC_COUNTER_BUFFER, GL_R32UI, 0, sizeof(GLuint), GL_RED_INTEGER, GL_UNSIGNED_INT, nullptr);
// Bind shader storage buffers
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, buffers.drawCandidates);
glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, buffers.drawCommands);
// Bind model matrix UBO and fill with data
glBindBufferBase(GL_UNIFORM_BUFFER, 0, buffers.modelMatrices);
vmath::mat4* pModelMatrix = (vmath::mat4*)glMapBufferRange(GL_UNIFORM_BUFFER, 0, 1024 * sizeof(vmath::mat4), GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
for (i = 0; i < 1024; i++)
{
float f = float(i) / 127.0f + nowTime * 0.025f;
float g = float(i) / 127.0f;
const vmath::mat4 model_matrix = vmath::translate(70.0f * vmath::vec3(sinf(f * 3.0f), cosf(f * 5.0f), cosf(f * 9.0f))) *
vmath::rotate(nowTime * 140.0f, vmath::normalize(vmath::vec3(sinf(g * 35.0f), cosf(g * 75.0f), cosf(g * 39.0f))));
pModelMatrix[i] = model_matrix;
}
glUnmapBuffer(GL_UNIFORM_BUFFER);
// Bind view + projection matrix UBO and fill
glBindBufferBase(GL_UNIFORM_BUFFER, 1, buffers.transforms);
TransformBuffer* pTransforms = (TransformBuffer*)glMapBufferRange(GL_UNIFORM_BUFFER, 0, sizeof(TransformBuffer), GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
float t = nowTime * 0.1f;
const vmath::mat4 view_matrix = vmath::lookat(vmath::vec3(150.0f * cosf(t), 0.0f, 150.0f * sinf(t)),
vmath::vec3(0.0f, 0.0f, 0.0f),
vmath::vec3(0.0f, 1.0f, 0.0f));
const vmath::mat4 proj_matrix = vmath::perspective(50.0f,
(float)info.windowWidth / (float)info.windowHeight,
1.0f,
2000.0f);
pTransforms->view_matrix = view_matrix;
pTransforms->proj_matrix = proj_matrix;
pTransforms->view_proj_matrix = proj_matrix * view_matrix;
glUnmapBuffer(GL_UNIFORM_BUFFER);
// Bind the culling compute shader and dispatch it
glUseProgram(programs.cull);
glDispatchCompute(CANDIDATE_COUNT / 16, 1, 1);
// Barrier
glMemoryBarrier(GL_COMMAND_BARRIER_BIT);
// Get ready to render
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glBindVertexArray(object.get_vao());
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
// Bind indirect command buffer and parameter buffer
glBindBuffer(GL_DRAW_INDIRECT_BUFFER, buffers.drawCommands);
glBindBuffer(GL_PARAMETER_BUFFER_ARB, buffers.parameters);
glUseProgram(programs.draw);
// Draw
glMultiDrawArraysIndirectCountARB(GL_TRIANGLES, 0, 0, CANDIDATE_COUNT, 0);
// Update overlay
if (nowTime > (lastTime + 0.25f))
{
fps = float(frames) / (nowTime - lastTime);
frames = 0;
lastTime = nowTime;
}
glDisable(GL_CULL_FACE);
updateOverlay();
frames++;
}
