a-game

commit 0932526a570609afc69439f7ffb61bf805a88a7d
parent 642c0708354d8b1cf8b2fd9d790a7a959f8e40da
Author: amin <dev@aminmesbah.com>
Date:   Mon,  4 Mar 2019 00:31:31 +0000

Render an obnoxious 'tile map'

FossilOrigin-Name: 015ad4077dabc3ce4a4ea7b7606eb4cdd3c1e242d44d6d64c481c19c9ee036cf
Diffstat:
M
shader/star_v.glsl
 | 
3
++-
M
src/game.c
 | 
65
++++++++++++++++++++++++++++++++++++++++++++++++++---------------
M
src/shader.c
 | 
8
++++++++

3 files changed, 60 insertions(+), 16 deletions(-)
diff --git a/shader/star_v.glsl b/shader/star_v.glsl
@@ -6,9 +6,10 @@ out vec4 vertex_color;
 
 uniform mat4 model;
 uniform mat4 projection;
+uniform vec3 color;
 
 void main()
 {
     gl_Position = projection * model * vec4(position, 0.0f, 1.0f);
-    vertex_color = vec4(1.0f, 1.0f, 1.0f, 1.0f);
+    vertex_color = vec4(color, 1.0f);
 }
diff --git a/src/game.c b/src/game.c
@@ -116,10 +116,10 @@ void game_init(struct GameState *game_state, v2u framebuffer)
     // set up and load tiles
     {
         GLfloat square_vertices[] = {
-             1.0f,  1.0f,
-             1.0f, -1.0f,
-            -1.0f, -1.0f,
-            -1.0f,  1.0f,
+             0.5f,  0.5f,
+             0.5f, -0.5f,
+            -0.5f, -0.5f,
+            -0.5f,  0.5f,
         };
 
         GLuint square_elements[] = { 0, 1, 3, 1, 2, 3 };
@@ -197,6 +197,8 @@ void game_update_and_render(struct GameState *game_state, float dt, v2u framebuf
         m4 projection = glmth_m4_init_id();
         projection = glmth_projection_ortho(0.0f, screen_width, screen_height, 0.0f, -1.0f, 1.0f);
         shader_setm4(&game_state->star_shader, "projection", &projection);
+        v3 color = glmth_v3_init(1.0f, 1.0f, 1.0f);
+        shader_setv3(&game_state->star_shader, "color", &color);
 
         glBindVertexArray(game_state->star_vao_id);
         glDrawArrays(GL_POINTS, 0, game_state->stars.num_stars - 1);
@@ -227,19 +229,52 @@ void game_update_and_render(struct GameState *game_state, float dt, v2u framebuf
 
     // render tiles
     {
-        m4 model = glmth_m4_init_id();
-        model = glmth_translate(model, glmth_v3_init(screen_width / 2.0f, screen_height / 2.0f, 0.0f));
-        model = glmth_scale(model, glmth_v3_init(10.0f, 10.0f, 10.0f));
-
+        glBindVertexArray(game_state->tiles.vao);
         shader_use(&game_state->star_shader);
-        shader_setm4(&game_state->star_shader, "model", &model);
-
-        m4 projection = glmth_m4_init_id();
-        projection = glmth_projection_ortho(0.0f, screen_width, screen_height, 0.0f, -1.0f, 1.0f);
-        shader_setm4(&game_state->star_shader, "projection", &projection);
+        uint32_t tile_map[9][16] = {
+            { 1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0, },
+            { 0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1, },
+            { 1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0, },
+
+            { 0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1, },
+            { 1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0, },
+            { 0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1, },
+
+            { 1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0, },
+            { 0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1,  0, 1, 0, 1, },
+            { 1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0,  1, 0, 1, 0, },
+        };
 
-        glBindVertexArray(game_state->tiles.vao);
-        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+        uint32_t start = 25;
+        float size = fabsf(100 * sinf(dt));
+        for (size_t y = 0; y < 9; y++)
+        {
+            for (size_t x = 0; x < 16; x++)
+            {
+                uint32_t tile_id = tile_map[y][x];
+                m4 model = glmth_m4_init_id();
+                model = glmth_translate(model, glmth_v3_init(start + (size * x), start + (size * y), 0.0f));
+                model = glmth_scale(model, glmth_v3_init(size, size, 1.0f));
+
+                shader_setm4(&game_state->star_shader, "model", &model);
+                v3 color;
+                if (tile_id > 0)
+                {
+                    color = glmth_v3_init(0.0f, 1.0f, 0.0f);
+                }
+                else
+                {
+                    color = glmth_v3_init(1.0f, 0.0f, 0.0f);
+                }
+                shader_setv3(&game_state->star_shader, "color", &color);
+
+                m4 projection = glmth_m4_init_id();
+                projection = glmth_projection_ortho(0.0f, screen_width, screen_height, 0.0f, -1.0f, 1.0f);
+                shader_setm4(&game_state->star_shader, "projection", &projection);
+
+                glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+            }
+        }
         glBindVertexArray(0);
     }
 }
diff --git a/src/shader.c b/src/shader.c
@@ -27,6 +27,8 @@ char *read_file(char *file_path)
     else
     {
         printf("Error: Couldn't open file at path: %s", file_path);
+        // TODO: handle errors here in a better way
+        exit(1);
     }
 
     return buffer;
@@ -49,6 +51,8 @@ struct Shader shader_compile(GLchar *vertex_path, GLchar *fragment_path)
     {
         glGetShaderInfoLog(vertex_shader, 512, NULL, info_log);
         printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n %s\n", info_log);
+        // TODO: handle errors here in a better way
+        exit(1);
     }
 
     GLuint fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
@@ -59,6 +63,8 @@ struct Shader shader_compile(GLchar *vertex_path, GLchar *fragment_path)
     {
         glGetShaderInfoLog(fragment_shader, 512, NULL, info_log);
         printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n %s\n", info_log);
+        // TODO: handle errors here in a better way
+        exit(1);
     }
 
     struct Shader s;
@@ -71,6 +77,8 @@ struct Shader shader_compile(GLchar *vertex_path, GLchar *fragment_path)
     {
         glGetShaderInfoLog(s.program, 512, NULL, info_log);
         printf("ERROR::SHADER::LINKING_FAILED\n %s\n", info_log);
+        // TODO: handle errors here in a better way
+        exit(1);
     }
 
     glDeleteShader(fragment_shader);