a-game

commit 30201940f1df5705ee1edb5bff8f552be10a2a26
parent 6d123e09139e715822372142ca754f6a4c78a50b
Author: Amin Mesbah <dev@aminmesbah.com>
Date:   Thu, 18 Apr 2019 13:44:15 -0700

Use a view matrix

Diffstat:
M
shader/main_v.glsl
 | 
3
++-
M
src/game.c
 | 
26
+++++++++++++++++---------

2 files changed, 19 insertions(+), 10 deletions(-)
diff --git a/shader/main_v.glsl b/shader/main_v.glsl
@@ -5,11 +5,12 @@ layout (location = 0) in vec2 position;
 out vec4 vertex_color;
 
 uniform mat4 model;
+uniform mat4 view;
 uniform mat4 projection;
 uniform vec3 color;
 
 void main()
 {
-    gl_Position = projection * model * vec4(position, 0.0f, 1.0f);
+    gl_Position = projection * view * model * vec4(position, 0.0f, 1.0f);
     vertex_color = vec4(color, 1.0f);
 }
diff --git a/src/game.c b/src/game.c
@@ -150,7 +150,8 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
                 model = glmth_translate(model, (v3) { viewport.min.x + (tile_size * x), viewport.min.y + (tile_size * y), 0.0f });
                 model = glmth_scale(model, (v3) {tile_size, tile_size, 1.0f});
 
-                shader_setm4(&game_state->tiles.shader, "model", &model);
+                m4 view = glmth_m4_init_id();
+
                 v3 color;
                 if (tile_id > 0)
                 {
@@ -162,6 +163,8 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
                 }
                 shader_setv3(&game_state->tiles.shader, "color", &color);
 
+                shader_setm4(&game_state->tiles.shader, "model", &model);
+                shader_setm4(&game_state->tiles.shader, "view", &view);
                 shader_setm4(&game_state->tiles.shader, "projection", &projection);
 
                 glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
@@ -192,8 +195,8 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
         {
             game_state->player.pos.x += movement_speed;
         }
-        //glmth_clamp(&(game_state->player.pos.x), 0, ROOM_TILE_DIM_X);
-        //glmth_clamp(&(game_state->player.pos.y), 0, ROOM_TILE_DIM_Y);
+        glmth_clamp(&(game_state->player.pos.x), 0, ROOM_TILE_DIM_X);
+        glmth_clamp(&(game_state->player.pos.y), 0, ROOM_TILE_DIM_Y);
     }
 
     // render player
@@ -206,14 +209,17 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
         // these dimensions are relative to a square 'meter', one tile
         v2 player_dim = { 0.375f, 0.583f };
 
+        // TODO: move ppm out of this matrix
         m4 model = glmth_m4_init_id();
-        model = glmth_translate(model, (v3) {0.0f, framebuffer.height, 0.0f});
-        model = glmth_scale(model, (v3) {1.0f, -1.0f, 1.0f});
-        model = glmth_translate(model, (v3) { viewport.min.x, viewport.min.y, 0.0f });
-        model = glmth_translate(model, (v3) { player.pos.x * ppm, player.pos.y * ppm, 0.0f });
-        model = glmth_scale(model, (v3) { player_dim.x * ppm, player_dim.y * ppm, 1.0f });
+        model = glmth_translate(model, (v3) {player.pos.x * ppm, player.pos.y * ppm, 0.0f});
+        model = glmth_scale(model, (v3) {player_dim.x * ppm, player_dim.y * ppm, 1.0f});
         shader_setm4(&game_state->tiles.shader, "model", &model);
 
+        m4 view = glmth_m4_init_id();
+        view = glmth_translate(view, (v3) {0.0f, framebuffer.height, 0.0f});
+        view = glmth_scale(view, (v3) {1.0f, -1.0f, 1.0f});
+        view = glmth_translate(view, (v3) {viewport.min.x, viewport.min.y, 0.0f});
+
         {
             printf("Framebuffer :");
             glmth_v2_print((v2) {framebuffer.width, framebuffer.height});
@@ -234,8 +240,10 @@ void game_update_and_render(struct GameMemory *game_memory, struct GameInput *ga
         }
 
         v3 color = (v3) { 1.0f, 0.0f, 1.0f };
-        shader_setv3(&game_state->tiles.shader, "color", &color);
 
+        shader_setv3(&game_state->tiles.shader, "color", &color);
+        shader_setm4(&game_state->tiles.shader, "model", &model);
+        shader_setm4(&game_state->tiles.shader, "view", &view);
         shader_setm4(&game_state->tiles.shader, "projection", &projection);
 
         glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);