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// Example demonstrating basic RAL usage by rendering a triangle
#include <celeritas.h>
// static vec4 vertices[] = {
// {-0.5f, -0.5f, 0.0f, 1.0},
// { 0.5f, -0.5f, 0.0f, 1.0},
// { 0.0f, 0.5f, 0.0f, 1.0}
// };
typedef struct VertexData {
vec4 position;
vec2 texCoords;
f32 pad1;
f32 pad2;
} VertexData;
VertexData squareVertices[] = {
{ { -0.5, -0.5, 0.5, 1.0f }, { 0.0f, 0.0f }, 0.0, 0.0 }, { { -0.5, 0.5, 0.5, 1.0f }, { 0.0f, 1.0f }, 0.0, 0.0 },
{ { 0.5, 0.5, 0.5, 1.0f }, { 1.0f, 1.0f }, 0.0, 0.0 }, { { -0.5, -0.5, 0.5, 1.0f }, { 0.0f, 0.0f }, 0.0, 0.0 },
{ { 0.5, 0.5, 0.5, 1.0f }, { 1.0f, 1.0f }, 0.0, 0.0 }, { { 0.5, -0.5, 0.5, 1.0f }, { 1.0f, 0.0f }, 0.0, 0.0 }
};
pipeline_handle draw_pipeline;
buf_handle tri_vert_buffer;
tex_handle texture;
void draw() {
render_pass_desc d = {};
gpu_encoder* enc = ral_render_encoder(d);
ral_encode_bind_pipeline(enc, draw_pipeline);
ral_encode_set_vertex_buf(enc, tri_vert_buffer);
ral_encode_set_texture(enc, texture, 0);
ral_encode_draw_tris(enc, 0, 6);
ral_encoder_finish_and_submit(enc);
}
int main() {
core_bringup("Celeritas Example: Triangle", NULL);
// create rendering pipeline
gfx_pipeline_desc pipeline_desc = {
.label = "Triangle drawing pipeline",
.vertex_desc = NULL, // TODO
.vertex = {
.source = NULL,
.is_spirv = false,
.entry_point = "vertexShader",
.stage = STAGE_VERTEX,
},
.fragment = {
.source = NULL,
.is_spirv = false,
.entry_point = "fragmentShader",
.stage = STAGE_FRAGMENT,
},
};
draw_pipeline = ral_gfx_pipeline_create(pipeline_desc);
// load texture from file
texture = ral_texture_load_from_file("assets/textures/mc_grass.jpeg");
// create our buffer to hold vertices
size_t buffer_size = sizeof(VertexData) * 6;
printf("size of vertices %ld\n", buffer_size);
tri_vert_buffer = ral_buffer_create(buffer_size, &squareVertices);
while (!app_should_exit()) {
glfwPollEvents();
ral_frame_start();
ral_frame_draw(&draw);
ral_frame_end();
}
return 0;
}
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