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stage2: draw procedural grass as sprites

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Andrei Alexeyev 2021-02-20 00:06:58 +02:00
parent 0115c55f51
commit 5e8a1be317
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GPG key ID: 72D26128040B9690
1 changed files with 19 additions and 9 deletions
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28
src/stages/stage2/draw.c
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@ -142,25 +142,35 @@ static void stage2_bg_grass_draw(vec3 pos) {
r_mat_mv_rotate(-M_PI/2 * 1.2, 1, 0, 0);
r_mat_mv_scale(2, 2, 2);
r_shader("pbr");
stage2_bg_setup_pbr_lighting(STAGE2_MAX_LIGHTS);
ShaderProgram *sprite_shader = res_shader("sprite_pbr");
r_uniform_float("metallic", 0);
r_uniform_sampler("tex", "stage2/grass_diffuse");
r_uniform_sampler("roughness_map", "stage2/grass_roughness");
r_uniform_sampler("normal_map", "stage2/grass_normal");
r_uniform_sampler("ambient_map", "stage2/grass_ambient");
r_uniform_vec3("ambient_color", 0.4, 0.4, 0.4);
r_shader_ptr(sprite_shader);
stage2_bg_setup_pbr_lighting(STAGE2_MAX_LIGHTS);
r_disable(RCAP_CULL_FACE);
// r_disable(RCAP_DEPTH_WRITE);
Sprite grass = { 0 };
grass.tex = res_texture("stage2/grass_diffuse");
grass.extent.as_cmplx = 1 + I;
grass.tex_area.extent.as_cmplx = 1 + I;
SpriteParams sp = { 0 };
sp.sprite_ptr = &grass;
sp.color = RGB(1, 1, 1);
// ambient color and metallicity
sp.shader_params = &(ShaderCustomParams) {{ 0.4, 0.4, 0.4, 0 }};
sp.shader_ptr = sprite_shader;
sp.aux_textures[0] = res_texture("stage2/grass_ambient");
sp.aux_textures[1] = res_texture("stage2/grass_normal");
sp.aux_textures[2] = res_texture("stage2/grass_roughness");
int n = 3;
for(int i = 0; i < n; i++) {
r_mat_mv_push();
r_mat_mv_rotate(M_PI*(i-n/2)/n*0.6,0,1,0);
r_mat_mv_translate((i-n/2)*0.2*f1,0,0);
r_draw_quad();
r_draw_sprite(&sp);
r_mat_mv_pop();
}