void multidrawindirect_app::render(double currentTime)
{
int j;
static const float one = 1.0f;
static const float black[] = { 0.0f, 0.0f, 0.0f, 0.0f };
static double last_time = 0.0;
static double total_time = 0.0;
if (!paused)
total_time += (currentTime - last_time);
last_time = currentTime;
float t = float(total_time);
int i = int(total_time * 3.0f);
glViewport(0, 0, info.windowWidth, info.windowHeight);
glClearBufferfv(GL_COLOR, 0, black);
glClearBufferfv(GL_DEPTH, 0, &one);
const vmath::mat4 view_matrix = vmath::lookat(vmath::vec3(100.0f * cosf(t * 0.023f), 100.0f * cosf(t * 0.023f), 300.0f * sinf(t * 0.037f) - 600.0f),
vmath::vec3(0.0f, 0.0f, 260.0f),
vmath::normalize(vmath::vec3(0.1f - cosf(t * 0.1f) * 0.3f, 1.0f, 0.0f)));
const vmath::mat4 proj_matrix = vmath::perspective(50.0f,
(float)info.windowWidth / (float)info.windowHeight,
1.0f,
2000.0f);
glUseProgram(render_program);
glUniform1f(uniforms.time, t);
glUniformMatrix4fv(uniforms.view_matrix, 1, GL_FALSE, view_matrix);
glUniformMatrix4fv(uniforms.proj_matrix, 1, GL_FALSE, proj_matrix);
glUniformMatrix4fv(uniforms.viewproj_matrix, 1, GL_FALSE, proj_matrix * view_matrix);
glBindVertexArray(object.get_vao());
if (mode == MODE_MULTIDRAW)
{
glMultiDrawArraysIndirect(GL_TRIANGLES, NULL, NUM_DRAWS, 0);
}
else if (mode == MODE_SEPARATE_DRAWS)
{
for (j = 0; j < NUM_DRAWS; j++)
{
GLuint first, count;
object.get_sub_object_info(j % object.get_sub_object_count(), first, count);
glDrawArraysInstancedBaseInstance(GL_TRIANGLES,
first,
count,
1, j);
}
}
}
void blinnphong_app::startup()
{
load_shaders();
glGenBuffers(1, &uniforms_buffer);
glBindBuffer(GL_UNIFORM_BUFFER, uniforms_buffer);
glBufferData(GL_UNIFORM_BUFFER, sizeof(uniforms_block), NULL, GL_DYNAMIC_DRAW);
object.load("media/objects/sphere.sbm");
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
}
void blinnphong_app::render(double currentTime)
{
static const GLfloat zeros[] = { 0.0f, 0.0f, 0.0f, 0.0f };
static const GLfloat gray[] = { 0.1f, 0.1f, 0.1f, 0.0f };
static const GLfloat ones[] = { 1.0f };
const float f = (float)currentTime;
glUseProgram(per_fragment_program);
glViewport(0, 0, info.windowWidth, info.windowHeight);
glClearBufferfv(GL_COLOR, 0, gray);
glClearBufferfv(GL_DEPTH, 0, ones);
/*
vmath::mat4 model_matrix = vmath::rotate((float)currentTime * 14.5f, 0.0f, 1.0f, 0.0f) *
vmath::rotate(180.0f, 0.0f, 0.0f, 1.0f) *
vmath::rotate(20.0f, 1.0f, 0.0f, 0.0f);
*/
vmath::vec3 view_position = vmath::vec3(0.0f, 0.0f, 50.0f);
vmath::mat4 view_matrix = vmath::lookat(view_position,
vmath::vec3(0.0f, 0.0f, 0.0f),
vmath::vec3(0.0f, 1.0f, 0.0f));
vmath::vec3 light_position = vmath::vec3(-20.0f, -20.0f, 0.0f);
vmath::mat4 light_proj_matrix = vmath::frustum(-1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 200.0f);
vmath::mat4 light_view_matrix = vmath::lookat(light_position,
vmath::vec3(0.0f), vmath::vec3(0.0f, 1.0f, 0.0f));
#if defined(MANY_OBJECTS)
int i, j;
for (j = 0; j < 7; j++)
{
for (i = 0; i < 7; i++)
{
glBindBufferBase(GL_UNIFORM_BUFFER, 0, uniforms_buffer);
uniforms_block * block = (uniforms_block *)glMapBufferRange(GL_UNIFORM_BUFFER,
0,
sizeof(uniforms_block),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
vmath::mat4 model_matrix = vmath::translate((float)i * 2.75f - 8.25f, 6.75f - (float)j * 2.25f, 0.0f);
block->mv_matrix = view_matrix * model_matrix;
block->view_matrix = view_matrix;
block->proj_matrix = vmath::perspective(50.0f,
(float)info.windowWidth / (float)info.windowHeight,
0.1f,
1000.0f);
glUnmapBuffer(GL_UNIFORM_BUFFER);
glUniform1f(uniforms[per_vertex ? 1 : 0].specular_power, powf(2.0f, (float)j + 2.0f));
glUniform3fv(uniforms[per_vertex ? 1 : 0].specular_albedo, 1, vmath::vec3((float)i / 9.0f + 1.0f / 9.0f));
object.render();
}
}
#else
glBindBufferBase(GL_UNIFORM_BUFFER, 0, uniforms_buffer);
uniforms_block * block = (uniforms_block *)glMapBufferRange(GL_UNIFORM_BUFFER,
0,
sizeof(uniforms_block),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
vmath::mat4 model_matrix = vmath::scale(7.0f);
block->mv_matrix = view_matrix * model_matrix;
block->view_matrix = view_matrix;
block->proj_matrix = vmath::perspective(50.0f,
(float)info.windowWidth / (float)info.windowHeight,
0.1f,
1000.0f);
glUnmapBuffer(GL_UNIFORM_BUFFER);
glUniform1f(uniforms[0].specular_power, 30.0f);
glUniform3fv(uniforms[0].specular_albedo, 1, vmath::vec3(1.0f));
object.render();
#endif
}
void multidrawindirect_app::startup()
{
int i;
load_shaders();
object.load("media/objects/asteroids.sbm");
glGenBuffers(1, &indirect_draw_buffer);
glBindBuffer(GL_DRAW_INDIRECT_BUFFER, indirect_draw_buffer);
glBufferData(GL_DRAW_INDIRECT_BUFFER,
NUM_DRAWS * sizeof(DrawArraysIndirectCommand),
NULL,
GL_STATIC_DRAW);
DrawArraysIndirectCommand * cmd = (DrawArraysIndirectCommand *)
glMapBufferRange(GL_DRAW_INDIRECT_BUFFER,
0,
NUM_DRAWS * sizeof(DrawArraysIndirectCommand),
GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT);
for (i = 0; i < NUM_DRAWS; i++)
{
object.get_sub_object_info(i % object.get_sub_object_count(),
cmd[i].first,
cmd[i].count);
cmd[i].primCount = 1;
cmd[i].baseInstance = i;
}
glUnmapBuffer(GL_DRAW_INDIRECT_BUFFER);
glBindVertexArray(object.get_vao());
glGenBuffers(1, &draw_index_buffer);
glBindBuffer(GL_ARRAY_BUFFER, draw_index_buffer);
glBufferData(GL_ARRAY_BUFFER,
NUM_DRAWS * sizeof(GLuint),
NULL,
GL_STATIC_DRAW);
GLuint * draw_index =
(GLuint *)glMapBufferRange(GL_ARRAY_BUFFER,
0,
NUM_DRAWS * sizeof(GLuint),
GL_MAP_WRITE_BIT |
GL_MAP_INVALIDATE_BUFFER_BIT);
for (i = 0; i < NUM_DRAWS; i++)
{
draw_index[i] = i;
}
glUnmapBuffer(GL_ARRAY_BUFFER);
glVertexAttribIPointer(10, 1, GL_UNSIGNED_INT, 0, NULL);
glVertexAttribDivisor(10, 1);
glEnableVertexAttribArray(10);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glEnable(GL_CULL_FACE);
}